RING-CONTRACTION

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相关期刊:《Chemical Research in Chinese Universities》更多>>
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Mass Spectrometric Fragmentation of 1,8-Bis[4-substituted- (oxazolin-2-yl)] anthracenes: Ring-contraction Rearrangement of Oxazoline Ring under Electron-Impact Ionization Conditions
《Chemical Research in Chinese Universities》2006年第6期753-755,共3页JIAO Peng MA Lin-ge ZHANG Qi-han XU Jia-xi 
Supported by the National Natural Science Foundation of China(No. 20272002).
The mass spectrometric fragmentation of 1,8-bis [ 4-substituted (oxazolin-2-yl) ] anthracenes (AnBOXes) was investigated by using mass-analyzed ion kinetic energy spectrometry under electron-impact ionization cond...
关键词:Bis-oxazoline EI-MS FRAGMENTATION Ring contraction 
Further Investigation on the Rearrangement Mechanism of Reactions of 1,5-Benzothiazepines with Ethoxycarbonylcarbene
《Chemical Research in Chinese Universities》2006年第1期36-39,共4页WU Chun-zan HUANG Jia-xing ZHANG Qi-han XU Jia-xi 
SupportedpartlybytheNationalNaturalScienceFoundationofChina(Nos.20272002and20472005),MinistryofEducationofP.R.China(SRFforROCSandEYTP)andPekingUniversity(PresidentGrant).
The reactions of 2,3-dihydro-1,5-benzothiazepines with ethoxyearbonylcarbene undergo complex rearrangements to produce rlng-opening and ring contraction products. Previously it was presumed that the different products...
关键词:1 5-BENZOTHIAZEPINE Ethoxycarbonylcarbene REARRANGEMENT RING-CONTRACTION RING-OPENING 
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